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TT: Fachverband Tiefe Temperaturen

TT 42: Poster: Correlated Electrons I

TT 42.2: Poster

Wednesday, March 29, 2023, 15:00–18:00, P2/OG2

Search for superconductivity in CeSb₂ under chemical pressure — •Jan Weber, Kristin Kliemt, and Cornelius Krellner — Max-von-Laue Straße 1, 60438 Frankfurt am Main, Physikalisches Institut

Recently, an unconventional superconducting state was discovered at a pressure-induced magnetic quantum critical point in the Kondo-lattice system CeSb₂[1]. Under normal pressure CeSb2 crystallizes in the orthorombic SmSb₂ structure (Space group 64) [2]. At high pressures, the crystal structure changes and CeSb₂ adopts the ZrSi₂ - structure (Space group 63)[1]. This change in structure precedes the superconductivity around the magnetic quantum critical point. In this contribution, we present first attempts to replace the physical pressure using adequate substituents to reproduce the high-pressure structure at ambient pressure.
[1] O.P. Squire et. al., arXiv:2211.00975 [cond-mat.str-el] (2022)
[2] R. Wang et. al., Inorg. Chem. 6, 1685 (1967)